This study aims to determine the antibacterial activity of Senduduk Bulu leaf extract (Clidemia hirta) on the growth of the bacteria Aeromonas hydrophila, Vibrio alginolyticus and Pseudomonas aeruginosa as well as the level/concentration of Senduduk Bulu leaf extract which is good for inhibiting the growth process of these pathogenic bacteria. The method used is an experimental method using a c…